Base variant
Side mutatorAfter your 6th move, one non-king piece on the affected side freezes for the rest of the match. It cannot move, capture, attack, defend, or give check. It remains on the board and blocks lines; normal moves cannot capture it.
Detailed rule
After your 6th move, one non-king piece on the affected side freezes for the rest of the match. It cannot move, capture, attack, defend, or give check. It remains on the board and blocks lines; normal moves cannot capture it.
